3-4 days free worldwide delivery

Plantar Shear Stress Distribution in Athletic Individuals with Frictional Foot Blisters

by MASS4D® Prescription Orthotics December 19, 2016

Abstracts

Foot blisters are related to excessive frictional forces experienced on or under the foot. For this reason, they are common in competitive sports and in military service.

This study sought to reveal the distribution of plantar shear forces in athletic individuals and its relevance to foot blisters.

Thirty-three volunteers were recruited and divided into three groups – one group with 11 active runners suffering from frequent blisters; a second group of 11 moderately active adults with no history of frictional blisters; and a third group of 11 physically active paediatric individuals.

Local barefoot forces were collected using a custom-built shear and pressure platform consisting of 80 sensors.


Offer your Patients a Custom Calibrated Insole with a 98% Patient Satisfaction Rate     know more


The forefoot region was of primary interest because athletic blisters most frequently occur in this area.

A custom-written Matlab code was used to mask five regions of the foot: the hallux, lessor toes, first metatarsal head, central metatarsal head region and lateral metatarsal head region.

Six parameters were determined for each of these five regions: peak pressure, peak resultant shear stress, peak-to-peak anteroposterior shear, peak-to-peak mediolateral shear, peak resultant shear-time integral, and peak anteroposterior shear-time integral.

Upon quantifying plantar shear stress distribution in athletic individuals, it was found that their shear forces were elevated compared with those of the control groups.

This increase in the shear parameters occurred despite the fact that athletic individuals walked 16% slower than the paediatric control group and at approximately the same speed as the adult control group.

This finding may be due to different frictional properties of the skin, intrinsic muscle activity, or increased pressure magnitudes.

The authors suggest further investigating whether foot blisters develop in areas with high shear stress. They also encourage studying increase in local temperature under the foot due to kinetic friction, as this may be relevant to blister formation.

Copyright 2016 MASS4D® All rights reserved.


Offer your Patients a Custom Calibrated Insole with a 98% Patient Satisfaction Rate     know more


References:

  1. Metin Yavuz, Brian L. Davis (2010) Plantar Shear Stress Distribution in Athletic Individuals with Frictional Foot Blisters. Journal of the American Podiatric Medical Association: March/April 2010, Vol. 100, No. 2, pp. 116-120

Leave a comment

Comments will be approved before showing up.


Also in Clinicians Blog

Abstracts
Foot and ankle history and clinical examination: A guide to everyday practice

by MASS4D® Prescription Orthotics August 12, 2018

This review summarises the keys points in taking a full history and performing a systematic clinical examination for patients with foot and ankle problem.

Read More

Abstracts
A comparison of running kinetics in children with and without genu varus: A cross sectional study

by MASS4D® Prescription Orthotics August 07, 2018

The aims of the present study were to examine differences in three dimensional ground reaction forces (GRF) during running at preferred speed in boys with genu varus compared to age-matched healthy controls.

Read More

Abstracts
Foot Structure in Boys with Down Syndrome

by MASS4D® Prescription Orthotics July 29, 2018

The aim of this study was the analysis of selected features of the foot structure in boys with Down Syndrome (DS) versus their age- and gender-matched peers without the condition.

Read More